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lesya692 [45]
2 years ago
9

How many significant figures are in 4.800x10-3?​

Chemistry
1 answer:
seraphim [82]2 years ago
5 0
4 after solving =0.004800 where 4,800 is the significant number
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What would be the final volume (in mL) of the aqueous potassium fluoride which was prepared by dissolving 8.0 g of potassium flu
zhuklara [117]

Answer:

0.15 L

Explanation:

Step 1. Calculate the <em>moles of KF.</em>

Molar mass = 58.10 g/mol

Moles of KF = 8.0 × 1/58.10  

Moles of KF = 0.138 mol KF

===============

Step 2. Calculate the <em>volume of KF </em>

c = n/V                  Multiply both sides by V

V = 0.138 × 1/0.89  

V = 0.15 L



5 0
3 years ago
9. Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the
Natali5045456 [20]

The question is incomplete, the complete question is :

Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the mass of a hydrogen atom.(Hint the mass of hydrogen atom is on order of 10^{-27} kg and the mass of bacterium is on order of 10^{-15} kg

Answer:

The total numbers of atom in bacterium are 10^{12}.

Explanation:

Mass of hydrogen atom, m= 10^{-27} kg

Mass of bacterium , M= 10^{-15} kg

Mass of bacterium atom =m'

Given ; m' =10\times m

m'=10\times 10^{-27} kg=10^{-26} kg

let the number of atoms in bacterium be N

m'\times N=M

N=\frac{M}{m'}=\frac{10^{-15} kg}{10^{-27} kg}=10^{12}

The total numbers of atom in bacterium are 10^{12}.

5 0
3 years ago
Molarity, chemistry general chemistry
Anna007 [38]

Answer:

a. 0.026 M

Explanation:

Molarity is a measure of the molar concentration of a solution. It can be calculated by using the following formula:

Molarity = n/V

Where;

n = number of moles (mol)

V = Volume of solution (L)

Based on the information provided;

V = 23.2mL = 23.2/1000 = 0.0232 L

n = ?

To get the number of moles of KHP, we use the formula:

mole = mass/molar mass

mole (n) = 0.123/204.2

mole (n) = 0.0006024mol

Molarity = n/V

Molarity = 0.0006024 ÷ 0.0232

Molarity = 6.024 × 10^-4 ÷ 2.32 × 10^-2

Molarity = 6.024/2.32 × 10^(-4--2)

Molarity = 2.59 × 10^-2

Molarity = 0.026 M

4 0
3 years ago
Which element is likely to have the highest thermal conductivity
givi [52]

sodium element is likely to have the highest thermal conductivity

7 0
4 years ago
Protons, Neutrons, and Electrons Practice Worksheet
ANTONII [103]

Answer:

Sorry I am not good at chemistry

Explanation:

6 0
3 years ago
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